Model Aircraft

Not an aircraft, but.....
 
DARPA unmanned water vehicle has undergone underwater testing,
 
 

Red, it would be interesting to know what proportion of those went on to cover the costs of development in production and sales.

That’s really remarkable, Red! I enjoy reading them (particularly the oddball ones). 

Reading on wiki. seems gear up landings happen to these guys also...
"In July 1983, C-5A Serial No. 68-0216 landed gear up at Travis Air Force Base, California. There were no injuries. The accident occurred while the crew was performing touch-and-go landings, and did not lower the landing gear during the final approach of the day. The aircraft received significant damage to the lower fuselage, ramp, clamshell doors, and main landing gear pods. The C-5A was later flown to Marietta for repairs. "

A 2x2 bogey would be pretty much impossible to steer and even trying would introduce severe sideforces on the strut unless the bogey itself was either articulated between the front and rear pairs or  both pairs could be independently steered like some 4 wheel steering cars..it would make the whole setup very complex